London tower block inferno: What we know

At least 12 people were killed in a massive blaze that engulfed a London tower block on Wednesday, raising serious questions about fire safety in Britain’s housing blocks. The police have said at least 12 people were killed at Grenfell Tower in west London and they expect the number to rise as emergency workers make their way through the building. The London Ambulance Service said it had treated 69 patients, 18 of whom remained in critical condition by Wednesday afternoon.